I have a relatively old HP Office Jet 5610 All in One Printer. Approximately once a week and whenever I switch off the mains power the Office Jet auto dials the following fax number 13452105. I have no idea who this number belongs to. When I dial it I just get a fax squelch sound. My problem is that whenever a fax is sent to this number I get a charge on my phone bill. My question is - how do I stop the Office Jet from auto dialling this number.